Skiving machine



Feb. l8 1936. E, A. WILLIAMS ET AL 2,030,950

SKIVNG MACHINE Filed June 20, 1934 Patented Feb. 18, 1936 UNTED STATES PATENT OFFICE SKIVING MACHINE Application June 20, 1934, Serial No. 731,500

9 Claims.

This invention relates to machines for operating upon parts of boots and shoes and is herein illustrated as embodied in a machine for skiving the opposite margins of the shank portions of soles to reduce the thickness of the edges of the soles at that locality.

In the manufacture of boots and shoes it is customary to thin the edges of the shank portions of soles by making two skiving cuts simultaneously along the opposite margins, a machine for performing this operation being disclosed in United States Letters Patent No. 1,382,689, granted June 28, 1921, upon an application filed in the name of William C. Stewart, the soles being located lengthwise in this machine preparatory to the skiving operation by placing the heel ends of the soles against the heel gages. It is in general desirable to locate the skiving cuts from the toe ends of soles, and this method of locating is particularly desirable when short soles are to be operated upon. Such soles, instead of being full length, are cut off at their heel ends so that they are of lengths less than the lengths of the bottoms of the shoes to which they are to be applied.

In order to take care of this and similar conditions, there is provided in accordance with one feature of the present invention in a machine for feeding a shoe part blank to an operating tool, a locating gage which is arranged to engage the forward end of the blank considered in the direction of feed movement. In the illustrated construction, a sole is fed by a pressure roll and a matrix roll to a knife which skives off the opposite margins of the shank portion of the sole, a gage being arranged in front of the rolls in position to have the toe end of the sole placed against it preparatory to the skiving operation, said gage having a thin sole-engaging edge to permit the sole to be fed over it during the skiving operation. These and other features of the invention including certain details of construction and combinations of parts will be described as embodied in an illustrated machine and pointed out in the appended claims.

Referring to the accompanying drawing,

Fig. 1 is a plan view of a machine in which the present invention is embodied with certain parts in section; and

Fig. 2 is a vertical section on the line II-I of Fig. 1.

The illustrated machine is substantially like the machine of the patent referred to above, except for the addition of toe gages which locate the soles when the soles are presented to the machine. Before describing what is new a brief description of the old machine and its mode of operation will be given.

The purpose of the machine is to skive the flesh side of soles to remove material from each side of the shank portion so as to reduce the thickness of the edges of the soles at that locality. In Fig. 1, two soles are shown properly located in the machine in position to be skived, the dot-and-das'h lines indicating the outlines of the skiving cuts which are to be made, said cuts extending approximately from the heel breast line to the ball line of each sole. When the soles have been properly presentedV to the machine as shown they are located transversely by heel breast gages I and ball line gages 9. They are located lengthwise by heel gages II, it being understood that the old machine is designed for operating upon full length soles the heel ends of which contact with the heel gages II; The soles are presented to the machine by thrusting them, heel ends foremost, between a matrix roll, indicated as a whole at I3 and provided with two matrices, and a presser roll (not shown) which is located directly below the matrix roll.v They are skived by being fed, toes foremost, by these rolls past la stationary knife indicated at I4. Between skiving operations, when the machine is at rest, the matrices of the matrix roll are at some distance from the presser roll so that an opening is provided between the rolls to permit the soles to be thrust between the rolls into the position shown, ready to be skived when the machine is started. The heel gages II and the heel breast gages 'I are mounted upon a sole feeding carriage I5. When the rotation of the matrix and the presser rolls is started, the sole-feeding carriage is simultaneously moved forward to advance the soles between the rolls at a speed which is approximately the same as the peripheral speed of the rolls. The matrix roll is controlled to bring the matrices into contact with the shank portion of the soles; and, when the soles have Ibeen firmly gripped betwen the two rolls, the carriage I5 stops and is returned to its starting position. The matrix and the presser rolls make one complete revolution and stop with the matrix in a predetermined position, ready for the next skiving operation and with a space between them so that the skived soles may be removed, toes foremost, from the machine. In order to position different kinds and sizes of soles properly the heel gages II and heel breast gages 1 are adjustably mounted on the sole-feeding carriage I and may be adjusted forward and back by turning a hand wheel I1 at the front of the machine. No further description of the construction and mode of opert ation of the old machine will be given, reference being made to the patent for details not described herein.. It will be understood, however, that the operator stands in front of the machine, thrusts two soles between the rolls into contact with the various gages and steps upon a treadle (not shown) whereupon the machine goes through one cycle of movement during which thesolesare j fed toward the operator, skived and finally freed so that they may be removed.

As has been explained, it is in general desirable to position the soles in the machine by gaging them from the toe ends, instead of fromthe heel ends, and such a procedurev is especially desirable, if not absolutely necessary, when short soles having cut-off rear ends such as those shown in the drawing are t0 be-operated upon. In order to provide for gaging soles by the toe ends, two toe gages I9, 2| are provided, such gages having thin, straight toe-engaging edges and being integral with a thin curved member 23 having a stem 25 which extends upwardly and then horizontally. The horizontal portion of the stem 25 is adjustably fastened to a bar 21 by a thumb screw 29 which passes through a slot 3| in the stem and is threaded into the bar. The bar 21 is horizontally slidable in a guide Vway which is rigid with the frame 3| of the machine and is located above the matrix roll. The bar 21 has formed at its rear end a rack 33 which meshes with a pinion 35 and is held in mesh with the pinion by engagement of its upper surface with the upper wall 31 of a stationary tunnel-like guide member carried by the frame of the machine. The axis of the pinion is rotatable in bearings in the vertical walls of this guide member; and between the bottom wall of the guide member and the pinion 35 is a second rack bar 4I which is fastened in a manner presently to be described to two of the heel gages 1 so that, Vwhen these gages are adjusted lengthwise of the soles by turning the hand wheel |1, the toe gages are adjusted through the same distance but in the opposite direction. The rack bar 4| has riveted to it a cross-bar 43; and to the opposite ends of the cross-bar are riveted respectively the upper ends of two short bent bars 45, the lower ends of the short bars being fastened respectively by screws 41 to the inner one of each set of heel breast gages 1. Thus when the hand wheel I1 is turned in one direction, the heel breast gages 1 are moved back and the toe gages I9, 2| are moved forward to provide for longer soles; and when the hand wheel is turned in the other direction, the heel breast gages are moved forward and the toe gages are moved back to provide for shorter soles. 'In order to provide for soles of different styles, the toe gages I9, 2| `may be adjusted independently of the heelbreast gages after the thumb screw 29 has been loosened.k It is obvious that when the toe gages are employed the heel gages II do not function. Inasmuch, however, as it may presently be desired to use these heel gages for operating upon full length soles there is no reason why they should be removed' from the machine.

In the manufacture of shoes short soles of various lengths and of various contours at their rear ends are employed, those illustrated having their rear ends cut 01T on straight lines which are substantially perpendicular to the axes of the soles.

In the operation of the machine the operator pushes two short soles over the toe gages I9, 2|, heel ends foremost, between the ball line gages 9 and the heel breast gages 1 and places the toe ends of the soles against the thin ends of the toe gages. I-Ie then steps upon a treadle and the machine goes through one cycle of movement in the manner which has been described above. It has been explained that when the machine comes to rest, there is an opening between the rolls to permit the soles to be thrust between them. This opening results from the fact that the matrix roll, like that of the machine o-f the Stewart patent referred to above, has a cut-away portion. As the rolls rotate and grip the soles, the forward ends of the soles are bent up somewhat so that the soles, as they are fed by the rolls, ride over the thin toe gages.

Although the invention has been set forth as embodied in a particular machine adapted t0 skive soles, it should be understood that the invention is not limited in the scope of its application to the particular machine which has been shown and described.

' Having described our invention, what we claim as new and desire to secure by Letters Patent of the United States is:

1. A machine for skiving a blank having, in combination, a pair of rolls one of which is a matrix roll, a knife located behind the bite of the rolls considered in the direction in which the rolls feed the blank, and an end gage for facilitating presentation of the blank in proper position with respect to the matrix roll, said gage being located on the'same side of the bite of the rolls as is the knife.

2. A machine for skiving a sole having in combination, a knife, means including a matrix roll for feeding a sole past said knife, a gage for facilitating accurate presentation of a sole to the inachine, said gage being located behind the knife considered in the direction of the feed movement of the sole and constructed and arranged to engage the toe end of the sole, and heel breast gages for engaging the sole onopposite sides in the vicinity of the heel breast line.

3. A machine for operating upon a shoe part blank having in combination, a tool, means for feeding the blank past the tool, gages for engaging the blank on opposite edges thereof, means for adjusting said edge gages, a gage for engaging an end of the blank, andv connections between the edge gages and the end gage such that adjusting the edge gages in one direction adjusts the end gage in the opposite direction.

4. A machine for operating upon a shoe part blank having in combination, a tool, means for feeding the blank past the tool, gages for engaging the blank on opposite edges thereof, means for adjusting said edge gages, a gage for engaging an end of the blank, connections between the edge gages and the end gage such that adjusting the edge gages in one direction adjusts the end gage in the opposite direction, and means whereby the end gage may be adjusted irrespective of the adjustment of the edge gages.

5. A machine for operating upon a shoe part blank having in combination, a tool, means for feeding the blank past the tool, gages for engaging opposite edges of the blank to locate it transversely, means for adjusting said edge gages longitudinally of the blank, a gage for engaging the forward end of the blank considered in the direction of feed movement to locate it longitudinally, connections between the edge gages and the end gage such that adjusting the edge gages in one direction adjusts the end gage in the opposite direction, and means whereby the end gage may be adjusted irrespective of the edge gages.

6. A machine for operating upon a shoe part blank having in combination, a tool, means for feeding the blank past the tool, gages for engaging opposite edges of the blank, means for adjusting said edge gages longitudinally of the blank, a rack bar connected to said gages, a pinion with which said rack bar meshes, a second rack bar also meshing with the pinion, and an end gage carried by said second rack bar.

7. A machine for operating upon a shoe part blank having in combination, a tool, means for feeding the blank past the tool, gages for engaging opposite edges of the blank, means for adjusting said edge gages longitudinally of the blank, a rack bar connected to said gages, a pinion with which said rack bar meshes, a second rack bar also meshing with the pinion, an end gage, and means for adjustably mounting said end gage on said second rack bar.

8. A machine for skiving opposite margins of the shank portion of a sole having in combination, a knife, means for feeding the sole past said knife, heel breast gages which are movable bodily with the sole, ball line gages which are stationary, and a toe-end gage. located in advance of the ball line gages considered in the direction of feed movement of the sole.

9. A machine for skiving a sole having, in combination, a knife, two feed rolls, one of which is a matrix roll, for feeding the sole to the knife, heel breast gages for engaging the sole at opposite points on the edge thereof in the Vicinity of the heel breast line, and a toe end gage located on the opposite side of the rolls from the heel breast gages.

ERNEST ALBERT WILLIAMS. ADOLPH FERDINAND BERGER. 

